Chulak is a planet that is approximately 2,000 light years away from Earth. It is the true home of Teal'c. The planet was originally part of Cronus' empire (proof of this are the Greek-like structures) and then was conquered by his mortal enemy, Apophis, which became the ruler of Chulak. The Jaffa Rebellion began here as the planet was the first to denounce the Goa'uld as false gods. Chulak later fell to the Ori but has presumably since been freed from their control in the aftermath of the Ori's defeat.

Named the 'Chappa'ai' by the locals on the planet, the Chulak Stargate has been present for over 5000 years. Under the control of Apophis, the Stargate area was cleared of forest and was almost made into a shrine with strategically placed stones around the area.

Chulak was discovered by SG-1 and SG-2 after MajorLouis Ferretti caught glimpse of Chulak's Stargate address on Abydos despite having been left badly injured by Apophis's attack on Adybos. Both teams proceeded to the planet but SG-1 was taken prisoner by Apophis. Sent to a jail, SG-1 and many Abydonians were almost killed until Teal'c of Chulak, Apophis's First Prime eventually defected and killed his other guards, helping SG-1 and the Abydonians to escape the planet to Earth. (SG1: "Children of the Gods")

Chulak was attacked by Apophis after he assumed control of Sokar's forces, thus the Jaffa of Chulak came to become strong supporters of the Jaffa Rebellion. Chulak was the first planet to be conquered by the Ori during their invasion of the Milky Way, most likely because Chulak was the first planet to denounce the Goa'uld, so the Ori would prove a point to the rest of the Jaffa by attacking the planet. SG-1 and Bra'tac tried to defend the planet, but failed and were nearly killed. Only the sudden intervention of the Odyssey saved them. Furthermore, Vala Mal Doran was finally freed from her time among the Ori followers when the Odyssey beamed her out of the ship in which she was trapped on the planet's surface. (SG1: "Maternal Instinct", "Lost City, Part 2", "Reckoning, Part 1", "Flesh and Blood")